#!/bin/bash
clear

TEXT='\033[30;107;2m'
INFO='\033[97;44m'
WARNING='\033[97;43m'
ERROR='\033[97;41m'
SUCCESS='\033[97;42m'
GREEN='\033[92m'
YELLOW='\033[93m'
RESET='\033[0m'

if [ "${EUID}" -ne 0 ]; then
  echo -e "${ERROR} RALAT ${RESET}${TEXT} Anda tiada kebenaran untuk menjalankan skrip ini! ${RESET}"
  exit 1
fi

function installPkg {
  read -p "Teruskan dengan pemasangan semula? [Y/n] " _yesno
  if [[ "$_yesno" =~ ^[Yy]$ ]]; then
    if [[ ! -f /etc/default/dropbear ]]; then
      wget -q -O - 'https://raw.githubusercontent.com/cybertize/debian/buster/packages/dropbear.sh' | bash
    fi
    {
      systemctl stop dropbear
      apt-get -y -qq --purge remove dropbear
      apt-get -y -qq autoremove
      apt-get -qq autoclean
    } &>/dev/null

    clear && sleep 3
    wget -q -O - 'https://raw.githubusercontent.com/cybertize/debian/buster/packages/dropbear.sh' | bash
  else
    echo -e "${ERROR} INFO ${RESET}${TEXT} Membatalkan pemasangan semula ${RESET}"
    exit 1
  fi
}

function uninstallPkg {
  read -p "Adakah anda pasti mahu menyahpasang dropbear? [Y/n] " _yesno
  if [[ "$_yesno" =~ ^[Yy]$ ]]; then
    {
      apt-get -y -qq --purge remove dropbear
      apt-get -y -qq autoremove
      apt-get -qq autoclean
    } &>/dev/null

    echo -e "${SUCCESS} INFO ${RESET}${TEXT} Bersihkan & Keluarkan pakej dropbear ${RESET}"
    exit 0
  else
    echo -e "${ERROR} INFO ${RESET}${TEXT} Batalkan penyahpasangan pakej ${RESET}"
    exit 1
  fi
}

function configurePkg {
  dropbear_port=$(cat /etc/default/dropbear | grep -w 'DROPBEAR_PORT' | cut -d '=' -f 2)
  dropbear_ports=$(cat /etc/default/dropbear | grep -w 'DROPBEAR_EXTRA_ARGS' | cut -d '"' -f 2 | grep -w '\-p' | cut -d ' ' -f 2,4,6)
  declare dropbear_ports

  echo
  echo "Secara lalai perkhidmatan dropbear mendengar pada port $dropbear_port"
  echo "dan port ini digunakan untuk sambungan stunnel"
  echo
  while true; do
    read -r -p "Adakah anda mahu menukar port [Y/n]? " _yesno
    case $_yesno in
    [Yy])
      until [[ $input_port =~ ^[0-9]+$ ]]; do
        read -p "Masukkan port baharu: " input_port
        if [[ -n $input_port ]]; then
          systemctl stop dropbear
          systemctl stop stunnel4
          sed -i "s|${dropbear_port}|${input_port}|g" /etc/default/dropbear
          sed -i "s|${dropbear_port}|${input_port}|g" /etc/stunnel/stunnel.conf

          echo -e "${SUCCESS} INFO ${RESET}${TEXT} Perubahan telah dibuat ${RESET}"
        else
          echo -e "${ERROR} INFO ${RESET}${TEXT} Dibatalkan ${RESET}"
          exit 1
        fi
      done
      systemctl restart dropbear
      systemctl restart stunnel4
      break
      ;;
    [Nn])
      echo -e "${SUCCESS} INFO ${RESET}${TEXT} Tiada perubahan dibuat ${RESET}"
      break
      ;;
    esac
  done

  echo
  echo "By default dropbear sevice use 3 extra ports $dropbear_ports if you"
  echo "want to change more then one port, you need to seperated them"
  echo "with [space] e.g. $dropbear_ports"
  echo
  while true; do
    read -r -p "Do you want to change port [Y/n]? " _yesno
    case $_yesno in
    [Yy])
      read -p "Enter new ports: " first_port second_port third_port
      if [[ -n $first_port && $first_port =~ ^[0-9]+$ ]]; then
        sed -i "s|${PORTS[0]}|$first_port|g" /etc/default/dropbear
      elif [[ -n $second_port && $second_port =~ ^[0-9]+$ ]]; then
        sed -i "s|${PORTS[1]}|$second_port|g" /etc/default/dropbear
      elif [[ -n $third_port && $third_port =~ ^[0-9]+$ ]]; then
        sed -i "s|${PORTS[2]}|$third_port|g" /etc/default/dropbear
      else
        echo -e "${ERROR} INFO ${RESET}${TEXT} Dibatalkan ${RESET}" && exit 1
      fi

      unset dropbear_ports
      systemctl restart dropbear && systemctl restart stunnel4
      echo -e "${INFO} INFO ${RESET}${TEXT} Perubahan telah dibuat ${RESET}"
      break
      ;;
    [Nn])
      echo -e "${INFO} INFO ${RESET}${TEXT} Tiada perubahan dibuat ${RESET}"
      break
      ;;
    esac
  done
}

function detailPkg {
  local unit_id=$(systemctl show dropbear.service -p Id | cut -d '=' -f 2)
  local unit_name=$(systemctl show dropbear.service -p Names | cut -d '=' -f 2)
  local unit_desc=$(systemctl show dropbear.service -p Description | cut -d '=' -f 2)
  local is_active=$(systemctl is-active dropbear.service)
  local is_enable=$(systemctl is-enabled dropbear.service)
  local dropbear_port=$(cat /etc/default/dropbear | grep -w 'DROPBEAR_PORT' | cut -d '=' -f 2)
  local dropbear_ports=$(cat /etc/default/dropbear | grep -w 'DROPBEAR_EXTRA_ARGS' | cut -d '"' -f 2 | grep -w '\-p' | cut -d ' ' -f 2,4,6)

  echo
  echo -e "${TEXT} ========================================================== ${RESET}"
  echo -e "${TEXT} Butiran perkhidmatan Dropbear                              ${RESET}"
  echo -e "${TEXT} ---------------------------------------------------------- ${RESET}"
  echo
  echo -e "${YELLOW}     ID:${RESET} ${GREEN}$unit_id${RESET}"
  echo -e "${YELLOW}   Name:${RESET} ${GREEN}$unit_name${RESET}"
  echo -e "${YELLOW}   Desc:${RESET} ${GREEN}$unit_desc${RESET}"
  echo -e "${YELLOW} Status:${RESET} ${GREEN}$is_active & $is_enable${RESET}"
  echo -e "${YELLOW}  Ports:${RESET} ${GREEN}$dropbear_port $dropbear_ports${RESET}"
  echo
  echo -e "${TEXT} ---------------------------------------------------------- ${RESET}"
  echo -e "${TEXT} Dicipta oleh Doctype, Dikuasakan oleh Cybertize.           ${RESET}"
  echo -e "${TEXT} ========================================================== ${RESET}"
  echo
}

function dropbearMenu {
  echo
  echo -e "${TEXT} ========================================================== ${RESET}"
  echo -e "${TEXT} MENU DROPBEAR                                              ${RESET}"
  echo -e "${TEXT} ---------------------------------------------------------- ${RESET}"
  echo
  echo -e "[01] ${GREEN}reinstall${RESET}  - ${YELLOW}Reinstall dropbear package${RESET}"
  echo -e "[02] ${GREEN}uninstall${RESET}  - ${YELLOW}Uninstall dropbear package${RESET}"
  echo -e "[03] ${GREEN}configure${RESET}  - ${YELLOW}Edit/Configure dropbear config${RESET}"
  echo -e "[04] ${GREEN}detail   ${RESET}  - ${YELLOW}Show dropbear detail & status${RESET}"
  echo -e "[00] ${GREEN}quit     ${RESET}  - ${YELLOW}Exit from menu${RESET}"
  echo
  echo -e "${TEXT} ---------------------------------------------------------- ${RESET}"
  echo -e "${TEXT} Dicipta oleh Doctype, Dikuasakan oleh Cybertize.           ${RESET}"
  echo -e "${TEXT} ========================================================== ${RESET}"
  echo
  while true; do
    read -p "Masukkan pilihan anda: " _choose
    case "$_choose" in
    01 | reinstall)
      installPkg && break
      ;;
    02 | uninstall)
      uninstallPkg && break
      ;;
    03 | configure)
      configurePkg && break
      ;;
    04 | detail)
      detailPkg && break
      ;;
    00 | quit)
      exit 0
      ;;
    *)
      echo -e "${ERROR} RALAT ${RESET}${TEXT} Pilihan tidak sah ${RESET}"
      dropbearMenu
      ;;
    esac
  done
}

if [[ -f /etc/default/dropbear ]]; then
  dropbearMenu
elif [[ ! -f /etc/default/dropbear ]]; then
  installPkg
fi
